Uhhhh... why the hell would I hate Valentine's Day? It's on a thirsty Thursday this year! Dollar mixed drinks and sad single girls at the bar! hahahaha j/k (kind of)
But in all seriousness, why begrudge other people their happiness, or as I'm sure is the case with a lot of couples, fake happiness? Despite being single my whole life, and never particularly enjoying that fact, I've never had any particular disdain for V-Day... especially when I see the number of couples that break up as a direct result of it 
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Not my chair, not my problem, that's what I say.